New Project

[Jeromie]

HI, I am a new member and I am about to start in on my CTD.

I bought the truck off my dad so he could buy the '05.

It is a 1991 Ram250 LE, BONE STOCK!!



Who is a good source for a KDP Tab kit, COMPLETE?

Where can I find the ASA Modifieds air intake kit, BLACK?

Best place and price on a 16cm housing?

Full, turbo to tip 4inch exhaust?

Will a 4 inch Downpipe rub or rattle on anything?



I have many friends with Dynos, How do I get a tach signal off my truck for the dyno? Will I need something special to put a Tach in?



1. Fix the KDP

2. I am going to get a baseline Hp. and Tq.

Then start from there, any tips and tricks would help!!

I am going to try and dyno after every Mod. I will post results on TDR.

 

[tugboatphil]

Holy Cow! I can't keep up with all those mods, but Welcome Aboard!! :-laf We're a little different here than the other forums... . kind of like the crazy uncle in the basement.



There are plenty of posts about all those items, but PDR is a good start.

 

[CSchafer]

Welcome, HTT had the cheapest turbo housings that I found. Depends on how serious your getting with the power but I have the non wastegated 14 housing from HTT and I love it, it spools awsome and I don't think it is too restrictive. To run it you have to shorten the down pipe by about an inch but maybe you could get the new exhaust to compinsate. They also have the 16.

The dyno will need an optical rpm pickup to get the rpms for the diesel. What I havent tried yet is our dyno has a low voltage pickup for like coil over plug aplications and I wonder if it would pick up an alternator signal that my tach runs off. Just a thought Good luck with the new truck. Cade

 

[Jeromie]

Thank you, HTT? I have not learned all the Shop names to know shorthand.



I know when a buddy of mine dynoed our F-450 we tow our racetrailer with, He clamped the pickup on to some wire in a harness on top of the motor, around the intake.



I am crunching numbers right now, I had a list a mile long that i want to do.

I am now considering a twin turbo setup, It replaces half the parts that I wanted and It should be able to make more power, safer with lower EGT's.



Is that correct?

Any drawbacks to twins?

Every day driver.



I think it is a good way to fix the leaning truck problem!!

Hang another turbo on the passender side should even it out

 

[tugboatphil]

Sorry. PDR is Piers Diesel Research. HTT is High Tech Turbo. They are both TDR advertisers. Click on the banners when you see one that might interest you. Also, the magazine is a good source too.



I agree on HTT too. They are very easy to work with, have a fast turnaround time and good pricing. Not to say that PDR doesn't, but I have done all my turbo stuff with High Tech.

 

[Jeromie]

Cool, thankyou for the advice.

I will keep everyone posted on the MODS.

 

[mysteryman]

Welcome

Hi Jeromie,,, Before you get too carried away there are a few things to consider. Your truck has a lot of miles on it... Messing around with the engine now may lead you to disaster... . Some of the guys on here seem to have money to burn and don't mind blowing up drive lines for the thrill of it... .



The cummins engine in your truck can be made to break the truck in half if you choose to... Making diesel engines make power is no real challenge at all.

The challenge is to make the truck perform well and stay together... ... .



All I recommend is the following.....

1) 16 cm housing

2) get a set of "190" injectors from PDR.

3)take off the muffler and replace it with a straight pipe. no need for 4"

4) advance the pump timing a few degrees (rotate pump clockwise about 1/8th")

5) Turn the main fuel screw on the pump clockwise 1 and 1/2 turns

6) Install a pyrometer (exhaust temp gauge) and learn how to use it.



Then leave everything else alone..... or make sure you have a lot of money on hand to replace the blown transmissions and rear ends..... or if you are real lucky you might just burn out a piston in the engine and get to rebuild it too. . LOL.



PDR is your best bet for all of your needs. They are one of the few that know their product!



PDR has the KDP fix also but if it has not come out in 300 k is most likely never will...



Good luck. Have fun with your new truck... . The 91/2/3 trucks were with out question the best pickups that ever came out of Detroit !!



One last thing... . don't be surprized if your dad tries to get his old truck back from you after driving his 05 for a few months..... Dad is in for a real shock...

The 05 is not half the truck you got.....

HI, I am a new member and I am about to start in on my CTD.

I bought the truck off my dad so he could buy the '05.

It is a 1991 Ram250 LE, BONE STOCK!!



Who is a good source for a KDP Tab kit, COMPLETE?

Where can I find the ASA Modifieds air intake kit, BLACK?

Best place and price on a 16cm housing?

Full, turbo to tip 4inch exhaust?

Will a 4 inch Downpipe rub or rattle on anything?



I have many friends with Dynos, How do I get a tach signal off my truck for the dyno? Will I need something special to put a Tach in?



1. Fix the KDP

2. I am going to get a baseline Hp. and Tq.

Then start from there, any tips and tricks would help!!

I am going to try and dyno after every Mod. I will post results on TDR.

 

[CSchafer]

I didn't see what trans your had in your truck and weither it has been rebuilt or not. Mine was almost stock with about 240k on it. It did have the banks intercooler, exhaust and guages. I started from there and with turning some screws and a 14cm housing I have a pretty fun truck. I did slip the stock clutch due to some pretty extreme beating on (4X4 sand drags) so I did put in an aftermarket clutch. My dads truck has about 320K on it know and we are still turning it up. As far as going with twins right off the bat I don't have them and only know one guy with them so I can't tell you how much fuel you have to have to utilize them, I'm guessing quite a bit. I eventually want them but I am taking it in steps. The biggest thing to keep in mind is to not throw away money, don't buy parts that will be usless after your next upgrade. I think the best thing to do is upgrade your turbo or go with an hx 35 that can later be used as a top turbo when you go with twins. Do alot of searches for turning up the VE and you will find tons of info and web sites on how to turn up and modify the VE and what to watch out for. Good luck, Cade

 

[Jeromie]

Mysteryman, and Cschafer, thank you for the advice.

I have thought about it a, and I guess doing twins on it would be kind of senseless, considering I am not looking for more than 300-350hp. I am just very big on doing it right the first time!!!

As far as the transmission it is an Overdrive, are there more than one auto in the 91's?

Ultimately I guess that is what is holding me back ,Is the transmission.

I would love to have 500hp and Gobs of torque, but If I am blowing the trans all the time, that is no fun.

My dad had the trans rebuilt about 10K ago, It finally started slipping on him.



I would like to get a LSD or detroit locker whatever is best, last night in the rain that right rear kept spinning and this truck is bone stock.



?? when you say 190 injectors, is that saying (enough fuel for 190hp or is that a flow number?)



My background is Sport Compact Drag Racing (2000 Honda Civic SI 8. 41@ 175mph 1/4mile in a FWD)



I am used to a different lingo, I am so clueless on Diesel engines.



I will propably Kill the KDP to be safe, I am a bit more aggressive driver than my dad



Mysteryman I am going to follow your advice on the mods, with maybe one or two added. I will do exhaust but maybe not the 4 inch.



Thanks guys!!

 

[JLEONARD]

I will do exhaust but maybe not the 4 inch.

I say go 4 inch without a doubt.

I kept the 3 inch downpipe, and went 4 inch back from there. I saw some pretty significant gains by going to the 4 inch... and that's even WITH the muffler (lots of noise natzis in Ct). I got 3 psi gain, faster spoolup, faster turbo cooldown. I think it's definately worth it.

Jay

 

[Jeromie]

who's downpipe?

Who's 4 inch exhaust?

Thanks

 

[mysteryman]

mods

"190" is the last part of the part # PDR will know what it means..... the detroit lockers are rough on tires and quite noisy! the stock dana clutch posi units work well for street... One of the guys on here may have one laying around for cheap... ... 350 hp is going to break your trans, frame and rear for sure... . If you really want that much power you might want to consider getting a Kenworth or a Peterbilt . LOL... 350 hp in a diesel would be like having a v8 gas engine that make 800 hp..... Keep in mind that I am an engineer ... . When I speak, I speak in real math... . Not BS math or advertising/book math... . There is a difference! the first truck we bolted the 5. 9 in back in 1983 was set to 325 hp real math..... We busted up a lot of parts and spent 5 years developing the trucks before they were ready to be released to the public... . We had good reason for turning down the power... And even still we had to redesign the frames in 1990 for the 91 model year because they were breaking in service behind stock engines... ... (due to people hauling trailers that exceeded the gvw rating that we stamped on the door pillar)



As for noise. I have straight pipes on most of my trucks. They are not very loud to me. . The turbo quiets them down a lot as it is... . I am getting old however and perhaps my hearing is going some... . I think the engine makes far more noise that the exhaust does anyway... .



Besides that... a truck is a work tool. Not a dragster... ... I recall so many years back when I would get a new vehicle. I would tear into it and start messing with things that I knew little about to make it faster... . I could never leave anything alone... . I recall my dad telling me "if some thing works do not mess with it" I did not catch on real quick back then... But dad had a real good point! After doing all the go fast things to my new ride all I did was fix it and spend money on it all the time. . Today I am kind of happy if things I own just work with out my having to fix them all the time... I certainly do not want to create any un needed work for myself anymore...



One last thing I might recommend is removing the anti stop... . I mean the anti lock rear brake valve... . Just bypass it and throw the valve in the trash... .

It most likely is not working any longer anyway... .



The mods I mentioned should give you between 215 to 230 hp in real math. .

As long as you are not hauling heavy loads you should not break up anything if you drive sensibly..... If you plan on hauling heavy trailers up big hills with these mods you had better watch you exhaust temp and let your foot up a bit if they get too high... After 1300 deg you start melting pistons



Good luck and have fun with your new truck...

Mysteryman, and Cschafer, thank you for the advice.

I have thought about it a, and I guess doing twins on it would be kind of senseless, considering I am not looking for more than 300-350hp. I am just very big on doing it right the first time!!!

As far as the transmission it is an Overdrive, are there more than one auto in the 91's?

Ultimately I guess that is what is holding me back ,Is the transmission.

I would love to have 500hp and Gobs of torque, but If I am blowing the trans all the time, that is no fun.

My dad had the trans rebuilt about 10K ago, It finally started slipping on him.



I would like to get a LSD or detroit locker whatever is best, last night in the rain that right rear kept spinning and this truck is bone stock.



?? when you say 190 injectors, is that saying (enough fuel for 190hp or is that a flow number?)



My background is Sport Compact Drag Racing (2000 Honda Civic SI 8. 41@ 175mph 1/4mile in a FWD)



I am used to a different lingo, I am so clueless on Diesel engines.



I will propably Kill the KDP to be safe, I am a bit more aggressive driver than my dad



Mysteryman I am going to follow your advice on the mods, with maybe one or two added. I will do exhaust but maybe not the 4 inch.



Thanks guys!!

 

[Niki]

So if you do that the truck will behave as if it doesn't have ABS? Do you have to do anything w/ the proportioning valve? I had a 91. 5 D250 w/ the Anti lock light on all the time and it would lock up one of the rear tires, but if you wiggled the connector going into the rearend sometimes it would work as it should. Would have been nice to know that then...